Method of forming metal articles



June 12, 1923. 1,458,699 w. GREVE I METHOD OF FORMING METAL ARTICLES Filed May 5, 1922 Patented June 12, 1923.

LOUIS w. ennvn, orcrnvnnann, c1110, ASSIGNOR ro'rnn cLnvELAnn nocK DRILL CLEVELAND, ,onro, a coaronn'rron or 01-110., i

1 COMPANY, or

' "mnrnono n' ronnrndrrnran ARTICLES:

' Annma ie-(1 May 3,

To all w ham itmay concern Be it known that I, i I citizen of thellnited States, residing at. Cleveland, in the county of Cuyahoga and 5 State-of Ohio," have invented a certain new and useful Improvement in Methods of Forming Metal. Articles. ofwhich the following is a full, clear, and exact description. I c This invention relates to a method of forming metal articles, and particularly a 'so-called guide shell for rock drills.

The guide shell in the productionof which my invention has particular utility is composed ofan elongated body portion w th parallel ways, and provided on one side midway between the ends with a conical or flaring head by'which the guide shell. is designed to be supported.

It could not be formed in its final or substantially final shape solely by the ordinary forging process in view of the tapering or flaring head which'could not,-in view of practical difiiculties, be forged even 1n substantially its final form when the body portion is forged.

By the present invention I am enabled to produce a forged provide a far superior article to a cast guide shell, which has the disadvantage that it is very susceptible to cracking and breakage.

By the present invention the shell is pro,- duced by a combined forging andupsetting process, the flaring head being given its shape by an upsetting process after thebody portion is formed, and the latter being forged with a tapering protuberance which is upset to produce a flaring head of the desired shape.

In the accompanying sheet of drawings wherein I have illustrated a guide shell formed in accordance with my invention, Fig. 1 is a side View of the forged piece from which the shell produced, a por tion being in section; Fig. 2 is a similar view of the completed shell after the flaring head has been formed by the upsetting process; Fig. 3 is a cross sectional view along v the line 33 of Fig. 1; and Fig. 4 is -a cross sectional view along the line 4-4 of Fig. 2. V

Referring now to the completed guide Louis W. Gnnvn, a

The shape of this article such that it guide shell, and thus 1922. seri a1 No. 558,183."

shell, itwill is observed that'it Consi ts an elongated trough-shaped body open at the hem: sid a h ins i Y wardly facing parallel ways 1 1 1 forfreceiving the tool to be supported,.and having 011 th e back face midway between its ends a flaring or conicalsupporting. head 11. Due principally to the presence of the flaring head 11 the shell could not be produced inforging dies having provision for shaping the head to, or substantially to the shape shown, and this would ordinarily necessltate the shell being formed from cast metal, but a device having the'shape shown and adapted for supporting a tool such as Y a rock drill would be very susceptible to breakage if forined ofcast metal. By my 1 y invention I an enabled to produce the dc vice partly by forging and partly. by upsettlng, with the result that a far more durable shell can be produced. than would be possible by a casting process.

By my invention the piece is forged into theshape shown in Figs. '1 and 3, the body part 10 having the sameshape as thebo dy of the finished'shell except that the ways" 11 must be subsequently machined, and holes 12 drilled in ears 13 with which thebody' of the shell is provided on opposite sides.

Furthermore, when this piece is forged there is provided on the back side, midway between its ends, a solid protuberance 10 which is of tapering-contour, and at itsfree I end is preferably concavedqas'shown at 10. I

In fact, it will be observed that when the piece is forged it has a. general tapering form from the top of the front face to the end of the protuberance as will be observed by reference to Fig. 3, so that-the piece can I, be readily formed: in the matrix of the die,

and readily. removed from'the die after it has been forged.

Then as a second step o f the process the protuberance 10 is upset in suitable upsettin con ical head 11, preferably recessed on its under side as shown in Figs. 2 and 4.

The upsetting is preferably done. immediately, after, the forged piece is removed dies into the shape of the flaring from the forging dies, and generally the piece will not have to be reheated, although whether or not it is reheated prior .to upsetting is immaterial tothe present invention.

When the protuberance 11 has been upset to form the head 11*, the piece is in comple ed form except for such machine Work as maybe necessary to form the ways 11, to true up the conical or flaring face, of the head andvthe like. There is thus produced relatively inexpensively, a guide shell suitable for-supporting a tool such as a rock drill, which shell is Very strong, particularly where the head unites with the boplly portion of the shell.v

gated body into a general tapering shape,

and with a tapering solid protuberance formed thereon, and then upsetting the protuberance so as to expand it laterally and decrease its depth.

3. The method offo'rming a guide shell for a tool which comprises forging an elongated trough-shaped body having oppositely disposed sides and with a protuberance which in cross section has a tapering form merging into the sides of the body, and

forming a flaring supporting head by "upsetting the protuberance and thusspreading the metal to assume a conical "form externall In testimony whereof. I hereunto affix my signature. v v

' "Louis w. GREXTE'. 

